Internal-combustion engine



FIG. 1 is a first perspective view of an internal-combustion engine;

FIG. 2 is a second perspective view of the internal-combustion engine;

FIG. 3 is a front elevation view of the internal-combustion engine;

FIG. 4 is a rear elevation view of the internal-combustion engine;

FIG. 5 is a top plan view of the internal-combustion engine;

FIG. 6 is a bottom plan view of the internal-combustion engine;

FIG. 7 is a right side elevation view of the internal-combustion engine;and,

FIG. 8 is a left side elevation view of the internal-combustion engine.

The broken lines shown in the drawings are for the purpose ofillustrating portions of the article that form no part of the claimeddesign.

CLAIM The ornamental design for an internal-combustion engine, as shownand described.